EP3718732B1 - Procédé et dispositif de fabrication des pièces moulées en matière plastique à plusieurs composants - Google Patents

Procédé et dispositif de fabrication des pièces moulées en matière plastique à plusieurs composants Download PDF

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Publication number
EP3718732B1
EP3718732B1 EP20167277.1A EP20167277A EP3718732B1 EP 3718732 B1 EP3718732 B1 EP 3718732B1 EP 20167277 A EP20167277 A EP 20167277A EP 3718732 B1 EP3718732 B1 EP 3718732B1
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EP
European Patent Office
Prior art keywords
mould
rim
movable
tool
injection
Prior art date
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Application number
EP20167277.1A
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German (de)
English (en)
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EP3718732C0 (fr
EP3718732A1 (fr
Inventor
Sebastian Pirl
Roger Kaufmann
Jens Richter
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Gk Concept GmbH
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Gk Concept GmbH
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Priority claimed from DE102020108596.6A external-priority patent/DE102020108596A1/de
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Publication of EP3718732A1 publication Critical patent/EP3718732A1/fr
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Publication of EP3718732B1 publication Critical patent/EP3718732B1/fr
Publication of EP3718732C0 publication Critical patent/EP3718732C0/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1679—Making multilayered or multicoloured articles applying surface layers onto injection-moulded substrates inside the mould cavity, e.g. in-mould coating [IMC]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1615—The materials being injected at different moulding stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1615—The materials being injected at different moulding stations
    • B29C45/162—The materials being injected at different moulding stations using means, e.g. mould parts, for transferring an injected part between moulding stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
    • B29C67/246—Moulding high reactive monomers or prepolymers, e.g. by reaction injection moulding [RIM], liquid injection moulding [LIM]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1615—The materials being injected at different moulding stations
    • B29C45/162—The materials being injected at different moulding stations using means, e.g. mould parts, for transferring an injected part between moulding stations
    • B29C2045/1621—The materials being injected at different moulding stations using means, e.g. mould parts, for transferring an injected part between moulding stations the transfer means operating independently from the injection mould cavity, i.e. during injection the transfer means are completely outside the mould cavity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/64—Mould opening, closing or clamping devices
    • B29C45/641—Clamping devices using means for straddling or interconnecting the mould halves, e.g. jaws, straps, latches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B29L2009/005—Layered products coated

Definitions

  • the invention relates to a method and a device for the production of multi-component plastic moldings, which combines the injection molding process, also referred to as injection molding (IM), for producing the base body from thermoplastic material and the partial or entire surface flooding with a reactive component mixture, such as polyurethane (PU), also known as Reactive Injection Molding (RIM), in a total cycle time that is independent of reaction time.
  • IM injection molding
  • PU polyurethane
  • RIM Reactive Injection Molding
  • the RIM process is in the DE 10 2005 013 975 A1 described.
  • Parts produced by injection molding are characterized by high strength and a low material price compared to PU.
  • PU can be used to produce high-quality, wear-resistant surfaces.
  • transparent PU can be used to create 3D effects on the surface of the item.
  • a solution with a sliding table device is available DE 20 2016 104 347 U1 and a turntable device is in the US 2004/00094866 A1 disclosed.
  • the DE 196 50 854 C1 discloses a method and apparatus for producing a multilayer plastic part, the apparatus comprising a rotatable base plate with two tool halves.
  • the DE 10 2007 051 701 A1 and the US 2003/0197307 A1 each disclose a method and a device for producing multi-component plastic molded parts using turntable technology.
  • the WO 2006/072366 A1 discloses a method and apparatus for molding and coating a substrate in a mold with at least two cavities.
  • the movable tool half of the first injection molding tool is designed to be closable at the same time with the movable tool half of the second injection molding tool, the tool halves of the first injection molding tool being designed to be able to be coupled to one another independently of the second injection molding tool and the tool halves of the second injection molding tool being designed to be able to be coupled to one another independently of the first injection molding tool.
  • the movable tool halves of both injection molding tools are designed to be movable for opening without or with the movable tool half of the other injection molding tool.
  • the object of the present invention is therefore to create a method and a device for producing multi-component plastic molded parts which allow the use of inexpensive, existing or common machine technology and compensate for the differences in the cycle time of the two sub-processes.
  • adjacent is meant that the RIM tool or tools respectively are arranged transversely or laterally on the right and/or left and/or above and/or below to or on the injection molding tool.
  • adjacent is also understood to mean a radial arrangement to the closing direction, which includes the specified directions and their combination.
  • the respective parting plane of the tool halves can lie in one plane.
  • the parting planes of the tool halves can also be in different planes.
  • the invention described enables the use of a plastics processing standard machine, for example a standard injection molding machine with a RIM tool, in particular if the injection molding cycle time or the injection molding process time and the RIM cycle time or the RIM process time are the same or approximately the same and thus the two processes in the In the injection molding process, the blank and in the RIM process the component can be carried out one after the other with little or no waiting time, on the one hand, and on the other hand, the different processes can also take place simultaneously in the neighboring tools.
  • the arrangement of the tools ensures short paths, especially for the blanks, in or on the standard plastics processing machine, which makes production more efficient.
  • the optimal number for efficiency is calculated from the ratio between the injection molding cycle time and the RIM cycle time.
  • the invention allows the injection molding tool and the RIM tool to be used independently of the RIM cycle time, without causing delays if one cycle had to wait for the end of the other cycle without being productive.
  • the invention offers the advantage that the generally better availability of simple 2-plate injection molding machines or standard injection molding machines can be used in companies and thus allows the use or conversion of inexpensive, existing or common machine technology.
  • An advantage of this invention is that the tool halves of the injection molding tool do not come into contact with the release agent required for the RIM process, depending on the components used in the RIM process.
  • a release agent is required or is already included in the components of the RIM process. If a release agent is required, it is only used on the mold halves of the RIM process that are separate from the injection molding process. The disruptive load on the injection molding tool with the release agent is thus avoided.
  • reactive components such as polyurethane (PU) for the process known as reactive injection molding (RIM)
  • PU polyurethane
  • RIM reactive injection molding
  • a plastics processing machine can be, for example, an injection molding machine or a press that includes an injection molding unit.
  • RIM tools or the injection molding tool include tool halves.
  • the respective cavities are formed by tool halves.
  • blank is understood to mean the intermediate product produced in the injection molding process, on which the RIM process still has to take place.
  • a component or multi-component component or multi-component component or combined component is understood to mean the product manufactured by the injection molding process and the RIM processes, i.e. the finished product in relation to these processes.
  • the process can be simplified in such a way that the respective or corresponding movable tool halves are driven or operated via the plastics processing machine and a separate drive for the movable tool halves of the RIM tool is not required.
  • the use or expansion of a standard injection molding machine is thereby favored or simplified.
  • the tool halves can also be driven independently of the movable tool halves of the injection molding tool.
  • the movable tool halves of the respective RIM tool advantageously remain on the fixed tool half of the respective RIM tool, regardless of the opening movable tool half of the injection molding tool, in order to decouple the injection molding process from the RIM process as required.
  • the respective movable and fixed tool halves of the respective RIM tool form the respective RIM cavity or RIM cavities independently of the opening movable tool half of the injection molding tool and keep the respective RIM tool closed by, depending on the process step, the respective movable tool half of the respective RIM tool from the movable tool half of the injection molding tool or is decoupled from another structural element of the plastics processing machine.
  • the force-transmitting parts of the plastics processing machine come into consideration as constructive elements, which are able to carry the movable tool halves and to transmit the force necessary for the respective process sequence or for closing the tool halves of the respective tool and to change the position.
  • This can be, for example, a clamping plate or a plate of the plastics processing machine.
  • the respective movable tool half of the respective RIM tool is coupled to the movable tool half of the injection molding tool or to another structural element of the plastics processing machine in order to reopen the movable tool half of the RIM tool in accordance with the process flow or to open the movable tool half to move accordingly.
  • the fixed or movable tool halves of the respective RIM tool are advantageously locked to form the respective RIM cavities, which means that the sustained operation of a drive or the plastics processing machine for reliably closing the tool halves of the respective RIM tool can be eliminated and further injection molding processes independent of the RIM can be eliminated process and the use of RIM tools can be continued or carried out.
  • the respective movable tool half of the respective RIM tool is advantageously coupled to the movable tool half of the injection molding tool or to another structural element of the plastics processing machine depending on the injection molding cycle time and RIM cycle time, whereby the movable tool half of the respective RIM tool without own drive or moves in a defined manner and the respective RIM tool is opened reliably.
  • the process is improved and the cycle times are shortened.
  • the automation can be done, for example, using robots or other appropriate measures.
  • the respective blanks are advantageously inserted from one of the tool halves of the injection molding tool into one of the tool halves of the RIM tool, with the finished components being removed from the other tool halves of the RIM tool at the same time, which in particular further promotes the changing and removal process the overall process is shortened.
  • the reactive component mixture can also be injected via the fixed tool half and, depending on the component and requirements, if necessary by appropriate Openings in the blank or, if suitable or necessary, are made via the movable tool half.
  • the RIM process can be carried out independently of the injection molding process, making the overall process more efficient.
  • the design requirements for the RIM tools or their tool halves for the RIM process are lower than for the injection molding process, so that the tool halves of the RIM tool are closed and locked or pressed together independently of the injection molding tool will and can be.
  • the respective movable tool halves of the RIM tool can be directly or indirectly coupled or connected to the movable tool half of the injection molding tool or to another structural element of the plastics processing machine, the design effort is reduced.
  • standard plastics processing machines can be easily converted and the existing structural elements can be used or expanded or adapted with little effort.
  • the movable tool halves of the RIM tools are arranged on one or each of their own clamping plates or base plates or on a clamping plate or base plate that is common to the movable tool half of the injection molding tool. This allows the design effort to be adjusted or minimized.
  • the movable tool half of the RIM tool is offset or simultaneously with the movable tool half of the injection molding tool is movable, the structural design and the process are simplified depending on the requirements, since on the one hand different drives are avoided and the control and thus the process are simplified and on the other hand, in the case of an offset movement, the process times or cycle times are further optimized by a possibly necessary time offset in the control of the tool halves.
  • the common clamping plate in particular simplifies the setup process and the setup process.
  • the available space can be used efficiently and the distance to the injection molding tool can be minimized.
  • the special design features and structure of the plastic processing machine must be taken into account. Particularly when moving the blanks or removing the component automatically, a collision-free arrangement of the RIM tool relative to one another and in relation to the injection molding tool must be taken into account.
  • the individual requirements of the respective RIM tool can be met. Take the process and work pressure into account and simplify the design costs.
  • the movable tool half of the at least one RIM tool can be detachably coupled to the clamping plate or base plate, with a force-fitting and/or positive coupling being provided, for example as a mechanically, hydraulically, pneumatically or electrically driven coupling or, for example, a magnetic coupling , whereby the respective movable tool half is only opened after the RIM process has been completed or is not opened for and during the RIM process.
  • a force-fitting and/or positive coupling being provided, for example as a mechanically, hydraulically, pneumatically or electrically driven coupling or, for example, a magnetic coupling , whereby the respective movable tool half is only opened after the RIM process has been completed or is not opened for and during the RIM process.
  • a device according to the invention for producing multi-component plastic moldings is, as in Figure 1 shown, an injection molding tool 3 is present on a plastics processing machine 1 as an injection molding machine 1.
  • the plastics processing machine 1 as an injection molding machine 1 comprises a fixed plate 1.1 and a movable plate 1.2, which as a higher-level movement known per se can be moved and pressed onto the fixed plate 1.1 or moved away from it by means of hydraulic cylinders or an electric drive or another suitable linear drive and thus at least the injection molding tool 3, which includes a fixed tool half 3.1 and a movable tool half 3.2.
  • the fixed tool half 3.1 is arranged on the fixed plate 1.1 and the movable tool half 3.2 is arranged on the movable plate 1.2.
  • the fixed tool half 3.1 and the movable tool half 3.2 are arranged between the fixed plate 1.1 and the movable plate 1.2.
  • Own or common clamping plates 4 or base plates 4 are arranged in particular on the movable plate 1.2 and follow their respective movements. This also applies to other structural elements of the plastic processing machine 1, which are arranged in particular on the movable plate 1.2.
  • RIM tools 5, 6, each with a movable and a fixed tool half 5.1, 5.2, 6.1, 6.2.
  • the fixed tool halves 5.1, 6.1 of the RIM tools 5, 6 are radially to the closing direction of the movable tool halves 3.2, 5.2, 6.2 adjacent to the fixed tool half 3.1 of the injection molding tool 3, i.e. at least laterally on both sides next to the fixed tool half 3.1 of the injection molding tool 3 arranged.
  • the RIM tools 5, 6 can be provided offset above or below the injection molding tool 3 as necessary, not shown.
  • the respective movable tool halves 5.2, 6.2 of the RIM tools 5, 6 can also be moved towards and against one another and pressed or moved away from one another by the overarching movement of the movable plate 1.2, depending on the process step.
  • the respective or relevant movement of the respective movable tool halves 5.2, 6.2 of the RIM tools 5, 6, depending on the process step is considered, if applicable, in relation to the movement of the movable tool half 3.2 of the injection molding tool 3.
  • the movable tool halves 5.2, 6.2 of the RIM tools 5, 6 are designed to be closable at the same time as the movable tool half 3.2 of the injection molding tool 3.
  • the RIM tools 5, 5 are designed to be lockable independently of the injection molding tool 3, so that on the one hand the respective RIM tools 5, 6 are and remain closed regardless of the position of the injection molding tool 3 or its movable tool half 3.2 and the movable tool half 3.2 of the injection molding tool 3 is moved to open without or with at least one of the movable tool halves 5.2, 6.2 of the RIM tools 5, 6.
  • the injection molding tool 3 alone or at least one of the movable tool halves 5.2, 6.2 of the RIM tools 5, 6 can be moved, provided the respective RIM process step enables or requires it.
  • the fixed and movable tool halves 5.1, 5.2, 6.1, 6.2 of the respective RIM tools 5, 6 can be individually locked, so that on the one hand the fixed and movable tool halves 5.1, 5.2, 6.1, 6.2 lock with one another or on one another and thus remain locked regardless of the injection molding process and the respective RIM cavity remains closed for the RIM process step.
  • the locking 13 in the parting plane of the movable and fixed tool halves 5.1, 5.2, 6.1, 6.2 of the respective RIM tools 5, 6 can be electrical, mechanical, hydraulic, pneumatic or a magnetic locking 13, which are the movable ones, depending on the respective process conditions and fixed tool halves 5.1, 5.2, 6.1, 6.2 as required and reliably absorb the forces during the RIM process, which arise from the filling pressure and the area of the cavity and keep the corresponding movable and fixed tool halves 5.1, 5.2, 6.1, 6.2 closed.
  • the locking 13 or the locking system of the fixed and movable tool halves 5.1, 5.2, 6.1, 6.2 of the RIM tools 5, 6 mold division can be achieved by means of a mechanically driven wedge system or a hydraulically driven wedge system or a pneumatically driven wedge system or an electrically driven wedge system or by means of Implement electromagnets.
  • the respective movable tool halves 5.2, 6.2 of the RIM tools 5, 6 are coupled to the movable tool half 3.2 of the injection molding tool 3, so that the respective movable tool halves 5.2, 6.2 of the RIM tools 5, 6 depending on Process step can be moved together with movable tool half 3.2 of the injection molding tool 3 for opening and closing.
  • the respective movable tool halves 5.2, 6.2 of the RIM tools 5, 6 can also be coupled to another structural element of the plastics processing machine 1, which enables the respective opening and closing.
  • the coupling 14 of the respective movable tool halves 5.2, 6.2 of the RIM tools 5, 6 with the movable tool half 3.2 of the injection molding tool 3 can be carried out indirectly, for example on a clamping plate 4 or base plate 4 or directly on one another.
  • the respective movable tool half 5.2, 6.2 of the respective RIM tools 5, 6 is detachably coupled to the respective clamping plate 4 or base plate 4 with a mechanical, hydraulic, pneumatic or electrically driven coupling 14 or with a magnetic coupling 14, thereby ensuring reliable opening of the respective RIM tools 5, 6 and a defined position of the opened respective movable tool half 5.2, 6.2 of the respective RIM tools 5, 6 must be taken into account.
  • a coupling 14 of the respective movable tool half 5.2, 6.2 of the respective RIM tools 5, 6 with the movable tool half 3.2 of the injection molding tool 3 is also possible with a mechanical, hydraulic, pneumatic or electrically driven coupling 14 or with a magnetic coupling 14.
  • the coupling system 14 for coupling and decoupling the movable tool half 5.2, 6.2 on the respective clamping plate 4 can be operated or carried out with a mechanical system, a hydraulically driven system, a pneumatically driven system, an electrically driven system or with an electromagnet.
  • the respective movable tool halves 5.2, 6.2 of the RIM tools 5, 6 are arranged on a clamping plate 4 or base plate 4 that is common to the movable tool half 3.2 of the injection molding tool 3, so that the respective locking 13 is in the parting plane of the tool half 5.1 , 5.2, 6.1, 6.2 of the RIM tool 5, 6 and the corresponding release of this lock 13 is realized on and with the clamping plate 4 or base plate 4 depending on the process step.
  • the movable tool half 5.2, 6.2 of the RIM tool 5, 6 is offset or simultaneously with the movable tool half 3.2 of the injection molding tool 3, for example via a corresponding additional drive is designed to be movable, not shown, in order to open the respective movable tool half 5.2, 6.2 of the RIM tool 5, 6 at a time offset.
  • the respective movable tool half 5.2, 6.2 of the RIM tool 5, 6 can be individually moved according to the specific arrangement on the movable tool half 3.2 of the injection molding tool 3 or on its own or the common clamping plate 4 or base plate 4.
  • the schematic representation in Figure 2 shows a plastics processing machine 1 in which an injection molding tool 3 is present, on which a number of identical RIM tools 5, 6 are arranged, tailored to the respective cycle times.
  • the respective locking system 13 must absorb the forces that arise from the filling pressure and the area of the cavity.
  • the respective clamping plates 4 of the RIM tools 5, 6 are firmly connected to the movable plate 1.2 of the injection molding machine 1. These clamping plates 4 have the task of holding one side of the coupling system 14.
  • Each RIM tool 5, 6 can have its own clamping plate 4.
  • the coupling system 14 enables the coupling 14 of the movable tool halves 5.2, 6.2 of the respective RIM tools 5, 6 with the respective clamping plate 4 at least for opening one side of the RIM tools 5, 6, i.e. the movable tool halves 5.2, 6.2 each to be held or released on the clamping plate 4 after the process step, depending on whether the RIM tool 5, 6 has to remain closed or has to be opened or has to remain open for the removal of the finished component 12 and the insertion of the next blank 10 .
  • plastic melt 10 for a blank 10 is injected on a plastic processing machine 1 as an injection molding machine 1 into an injection molding tool 3, comprising a fixed tool half 3.1 and a movable tool half 3.2, and then on or around the Blank 10 in a RIM tool 5, 6, comprising a fixed tool half 5.1, 6.1 and a movable tool half 5.2, 6.2, a reactive component mixture 11 is injected, provides that, how Figure 3 shown, in a first cycle the tools 3, 5, 6 are closed and an injection molding process takes place in the injection molding tool 3 as, for example, the first injection molding process of the blank 10, like this Figure 4 is shown.
  • the locks 13 of the fixed and movable tool halves 5.1, 5.2, 6.1, 6.2 are inactive O.
  • the coupling 14 in the parting plane of the tool half 5.2, 6.2 to the respective clamping plate 4 is active X.
  • Closing the injection molding tool 3 with the fixed tool half 3.1 and movable tool half 3.2 as well as the respective RIM tools 5, 6 with the fixed tool halves 5.1, 6.1 and the movable tool halves 5.2, 6.2 involves closing the plastics processing machine 1 as an injection molding machine 1 by moving the movable plate 1.2 in the direction of the fixed plate 1.1 of the injection molding machine 1.
  • At least the opening of the injection molding tool 3 involves opening the plastics processing machine 1 as an injection molding machine 1 by moving the movable plate 1.2 away from the fixed plate 1.1 of the injection molding machine 1 and thus by moving the movable tool half 3.2 away from it fixed tool half 3.1.
  • the RIM tools 5, 6 can be individually moved by moving the movable tool half 5.2, 6.2 and at least in accordance with the movement of the movable plate 1.2 of the injection molding machine 1 and/or the movement of the movable tool half 3.2 of the injection molding tool 3.
  • the respective closing or opening movable tool halves 5.2, 6.2 of the respective RIM tool 5, 6 move depending on the process step or cycle in accordance with the movable tool half 3.2 of the injection molding tool 3.
  • the movable tool halves 5.2 remain, 6.2 of the respective RIM tool 5, 6 independently of the opening movable tool half 3.2 of the injection molding tool 3 on the fixed tool half 5.1, 6.1 of the respective RIM tool 5, 6.
  • the blank 10 is an injection molded part, as in Figure 6 shown, transferred from the fixed tool half 3.1 of the injection molding tool 3 into the fixed tool half 5.1 of the first RIM tool 5, for example removed from the fixed tool half 3.1 of the injection molding tool 3 and inserted into the fixed tool half 5.1. It is also possible for the injection molded part to be transferred from the fixed tool half 3.1 of the injection molding tool 3 into the movable tool half 5.2 of the first RIM tool 5.
  • the injection molding tool 3 and the first RIM tool 5 then close in a third cycle by moving the respective movable tool halves 3.2, 5.2.
  • the injection molding process of a blank 10 as a second injection molding process.
  • the RIM process for a combined component 12 takes place in the first RIM tool 5.
  • the locking 13 of the fixed and movable tool halves 5.1, 5.2 is active X.
  • the coupling 14 in the parting plane of the tool half 5.2 to the respective clamping plate 4 is inactive O .
  • the second RIM tool 6 remains closed, with the locks 13 of the fixed and movable tool halves 6.1, 6.2 being active Clamping plate 4 or base plate 4 is decoupled.
  • a fourth bar as in Figure 8 shown, the injection molding tool 3 and a second RIM tool 6 are opened by moving the respective movable tool halves 3.2, 6.2 away from the fixed tool halves 3.1, 6.1.
  • the lock 13 of the fixed and movable tool halves 6.1, 6.2 is inactive O and the coupling 14 in the parting plane of the tool half 6.2 to the respective clamping plate 4 is active X, so that the movable tool halves 6.2 is coupled to the clamping plate 4 or base plate 4.
  • the first RIM tool 5 is closed for the ongoing RIM process.
  • the locking 13 of the fixed and movable tool halves 5.1, 5.2 is active
  • the blank 10 is, as in Figure 8 represented, from the fixed or movable Tool half 3.1, 3.2 of the injection molding tool 3 is automatically transferred into the empty or emptied fixed or movable tool half 6.1, 6.2 of the second RIM tool 6.
  • the fixed or movable tool half 6.1, 6.2 of the second RIM tool 6 may not be empty. Therefore, it is accordingly provided that, if necessary, removal of the finished component 12 from the fixed or movable tool half 6.1, 6.2 of the second or further RIM tool 6 is carried out automatically for emptying and thus the fixed or movable tool half 6.1, 6.2 is emptied and then the blank 10 is inserted into the emptied stationary tool half 6.1.
  • the injection molding tool 3 and the second RIM tool 6 are closed by moving the movable tool half 6.2.
  • the injection molding process as a third injection molding process now takes place in the injection molding tool 3 and a new RIM process takes place in the second RIM tool 6.
  • the locking 13 of the fixed and movable tool halves 6.1, 6.2 is active for this purpose x and the coupling 14 in the parting plane the tool half 6.2 to the respective clamping plate 4 is inactive, so that the movable tool halves 6.2 is decoupled from the clamping plate 4 or base plate 4.
  • the first RIM tool 5 is closed for the ongoing RIM process.
  • the locking 13 of the fixed and movable tool halves 5.1, 5.2 is active
  • a RIM process is now running in both RIM tools 5, 6.
  • the sequence of bars forms a cycle that can run continuously.
  • the injection molding tool 3 and the first RIM tool 5 are opened by moving the respective movable tool halves 3.2, 5.2.
  • the lock 13 of the fixed and movable tool halves 5.1, 5.2 is inactive O and the coupling 14 in the parting plane of the tool half 5.2 to the respective clamping plate 4 is active X, so that the movable tool halves 5.2 is coupled to the clamping plate 4 or base plate 4.
  • the blank 10 is, as in Figure 10 shown, for example automatically transferred from the fixed tool half 3.1 of the injection molding tool 3 into the empty or emptied fixed tool half 5.1 of the first RIM tool 5, with the first finished component 12 of this cycle also being removed from the movable tool half 5.2 of the first RIM tool 5 is removed automatically.
  • the blank 10 is inserted from the fixed or movable tool half 3, 1, 3.2 of the injection molding tool 3 into the free movable or fixed tool half 5.1, 5.2, 6.1, 6.2 of one of the RIM tools 5, 6 , while the finished component 12 is being emptied or removed from the other tool half 5.1, 5.2, 6.1, 6.2 of this RIM tool 5, 6, so that the transfer and removal can take place automatically simultaneously, as shown in Figure 10 is shown.
  • This process repeats itself as a cycle from the third measure onwards.
  • the injection molding tool 3 and the first RIM tool 5 close by moving the respective movable tool halves 3.2, 5.2.
  • the injection molding process of a blank 10 as the fourth injection molding process.
  • the RIM process for a combined component 12 takes place in the first RIM tool 5.
  • the second RIM tool 6 remains closed, with the locks 13 of the fixed and movable tool halves 6.1, 6.2 being active X and the coupling 14 in the parting plane the tool half 6.2 to the respective clamping plate 4 is inactive O, the movable tool halves 6.2 are decoupled from the clamping plate 4 or base plate 4.
  • the locking, unlocking, coupling or decoupling of the two RIM tools 5, 6 is as above Figure 7 or to the third bar.
  • Figure 12 is shown in accordance with the fourth cycle that the injection molding tool 3 and the second RIM tool 6 are opened by moving the respective movable tool halves 3.2, 6.2, while the first RIM tool 5 remains closed and the blank 10 from the fixed tool half 3 ,1, of the injection molding tool 3 into the empty or emptied fixed tool half 6.1, 6.2 of the second RIM tool 6 is transferred automatically.
  • the finished component 12 is automatically removed here, for example, from the movable tool half 6.2 of the second RIM tool 6.
  • the locking, unlocking, coupling or decoupling of the two RIM tools 5, 6 is as above Figure 8 or to the fourth bar.
  • the transfer of the blank 10 produced by injection molding from the injection molding tool 3 into the RIM tools 5, 6 and the removal of the finished component 12 from the respective RIM tools 5, 6 can be done either manually or automatically.
  • FIG 13 a plastics processing machine 1 is shown, in which an injection molding tool 3 is present, on which a RIM tool 5 is arranged.
  • a lock 13 or a locking system 13 in the parting plane of the RIM tool half 5.1, 5.2 in order to securely close the RIM tool 5 or the mold parting plane if necessary when the injection molding machine 1 and thus the injection molding tool 3 are open close. If individual closing of the RIM tool 5 or the mold parting plane is not necessary, the lock 13 or the locking system 13 can be dispensed with, as this reduces the design effort when using only one RIM tool 5. If a locking system 13 is present, it must absorb the forces caused by the filling pressure and the area of the cavity.
  • the clamping plate 4 of the RIM tool 5 is firmly connected to the movable plate 1.2 of the injection molding machine 1. This clamping plate 4 also has the task of one side of the to accommodate any existing coupling system 14.
  • the RIM tool 5 can have its own clamping plate 4.
  • the coupling system 14, if present, enables the coupling 14 of the movable tool half 5.2 of the RIM tool 5 with the clamping plate 4 at least for opening one side of the RIM tool 5, 6, i.e. the movable tool half 5.2 depending on the process step on the clamping plate 4 to hold or release, depending on whether the RIM tool 5 has to remain closed or has to be opened or has to remain open for the removal of the finished component 12 and the insertion of the next blank 10.
  • one method provides that for the production of multi-component plastic moldings on a plastics processing machine 1 according to the invention as an injection molding machine 1 in an injection molding tool 3, comprising a fixed tool half 3.1 and a movable tool half 3.2, plastic melt 10 for a blank 10 is injected and then a reactive component mixture 11 is injected onto or around the blank 10 in a RIM tool 5 comprising a fixed tool half 5.1 and a movable tool half 5.2, the tools 3, 5 being closed in a first cycle and in the injection molding tool 3 an injection molding process takes place as, for example, the first injection molding process of the blank 10, like this Figure 14 is shown.
  • the locks 13 of the fixed and movable tool halves 5.1, 5.2 are inactive O.
  • the coupling 14 in the parting plane of the tool half 5.2, 6.2 to the respective clamping plate 4 is active X.
  • the blank 10 is an injection molded part, as in Figure 15 shown, transferred from the fixed tool half 3.1 of the injection molding tool 3 into the fixed tool half 5.1 of the RIM tool 5, for example removed from the fixed tool half 3.1 of the injection molding tool 3 and inserted into the fixed tool half 5.1. It is also possible that the injection molded part comes from the fixed mold half 3.1 of the injection molding tool 3 is transferred into the movable tool half 5.2 of the RIM tool 5.
  • the injection molding tool 3 and the RIM tool 5 then close in a third cycle by moving the movable tool halves 3.2, 5.2.
  • the injection molding process of a blank 10 as a second injection molding process.
  • the RIM process for a combined component 12 takes place in the RIM tool 5.
  • the locking 13 of the fixed and movable tool halves 5.1, 5.2 is active However, X can also remain active.
  • the blank 10 is, as in Figure 17 shown, for example automatically transferred from the fixed tool half 3.1 of the injection molding tool 3 into the empty or emptied fixed tool half 5.1 of the first RIM tool 5, with the first finished component 12 of this cycle also being automated from the movable tool half 5.2 of the RIM tool 5 is removed.
  • This process repeats itself as a cycle from the third measure onwards.
  • the injection molding tool 3 and the RIM tool 5 close by moving the respective movable tool halves 3.2, 5.2.
  • the injection molding process of a blank 10 as the fourth injection molding process.
  • the RIM process for a combined component 12 takes place in the RIM tool 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Claims (13)

  1. Procédé de fabrication de pièces moulées en plastique multicomposants selon lequel de la matière plastique en fusion (10) est injectée dans un outil de moulage par injection (3) d'une machine de transformation des matières plastiques (1), comprenant une moitié d'outil fixe (3.1) et une moitié d'outil mobile (3.2), en vue de produire une ébauche (10) et ensuite un mélange de composants réactifs (11) est injecté dans un outil MIR (5, 6) agencé sur la machine de transformation des matières plastiques (1), comprenant une moitié d'outil fixe (5.1, 6.2) et une moitié d'outil mobile (5.2, 6.2), en vue de l'appliquer sur ou autour de l'ébauche (10),
    caractérisé en ce que
    - au cours d'un premier cycle, les outils (3, 5, 6) sont fermés et une opération de moulage par injection est effectuée dans l'outil de moulage par injection (3) en vue de produire une première ébauche (10),
    - au cours d'un deuxième cycle, l'outil de moulage par injection (3) et un premier outil MIR (5) sont ouverts par le déplacement des moitiés d'outil fixes respectives (3.2, 5.2), tandis qu'au moins un deuxième outil MIR ou un outil MIR supplémentaire (6) reste fermé et la première ébauche (10) est transférée de la moitié d'outil fixe ou mobile (3.1, 3.2) de l'outil de moulage par injection (3) vers la moitié d'outil fixe ou mobile (5.1, 5.2) du premier outil MIR (5),
    - au cours d'un troisième cycle, l'outil de moulage par injection (3) et le premier outil MIR ou un outil MIR supplémentaire (5) sont fermés par le déplacement des moitiés d'outil mobiles respectives (3.2, 5.2) et une autre opération de moulage par injection est effectuée dans l'outil de moulage par injection (3) en vue de produire une deuxième ébauche ou une ébauche supplémentaire (10) et un processus MIR est effectué dans le premier outil MIR ou l'outil MIR supplémentaire (5) en vue de poursuivre le traitement de la première ébauche (10) afin d'en faire le/un composant fini (12),
    - au cours d'un quatrième cycle, l'outil de moulage par injection (3) et le deuxième outil MIR ou l'outil MIR supplémentaire (6) sont ouverts par le déplacement des moitiés d'outil mobiles respectives (3.2, 6.2), tandis qu'au moins le premier outil MIR ou l'outil MIR supplémentaire (5) reste fermé et la deuxième ébauche (10a) est transférée de la moitié d'outil fixe ou mobile (3,1, 3.2) de l'outil de moulage par injection (3) vers la moitié d'outil fixe ou mobile vide ou vidée (6.1, 6.2) du deuxième outil MIR ou de l'outil MIR supplémentaire (6), le composant fini (12) étant prélevé de la moitié d'outil fixe ou mobile (6.1, 6.2) du deuxième outil MIR ou de l'outil MIR supplémentaire (6) en vue du vidage,
    - au cours d'un cinquième cycle, l'outil de moulage par injection (3) et le deuxième outil MIR ou l'outil MIR supplémentaire (6) sont fermés par le déplacement des moitiés d'outil mobiles respectives (3.2, 6.2) et l'opération de moulage par injection est effectué dans l'outil de moulage par injection (3) en vue de produire une troisième ébauche (10) et un processus MIR est effectué dans le deuxième outil MIR ou l'outil MIR supplémentaire (6) en vue de poursuivre le traitement de la deuxième ébauche (10b) afin d'en faire le/un composant fini (12),
    - au cours d'un sixième cycle, l'outil de moulage par injection (3) et le premier outil MIR ou un outil MIR supplémentaire (5) sont ouverts par le déplacement des moitiés d'outil mobiles respectives (3.2, 5.2), tandis que le deuxième outil MIR ou l'outil MIR supplémentaire (6) reste fermé et la troisième ébauche (10) est transférée de la moitié d'outil fixe ou mobile (3,1, 3.2) de l'outil de moulage par injection (3) vers la moitié d'outil fixe ou mobile vide ou vidée (5.1, 5.2) du premier outil MIR ou d'un autre outil MIR supplémentaire (5), le composant fini (12) étant prélevé de la moitié d'outil fixe ou mobile (5.1, 5.2) du premier outil MIR ou de l'outil MIR supplémentaire (5) en vue du vidage,
    - et que le déroulement se répète de manière cyclique à partir du troisième cycle.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    les moitiés d'outil mobiles respectives qui se ferment ou s'ouvrent (5.2, 6.2) de l'outil MIR respectif (5, 6) se déplacent avec la moitié d'outil mobile (3.2) de l'outil de moulage par injection (3) et/ou que les moitiés d'outil mobiles (5.2, 6.2) de l'outil MIR respectif (5, 6) restent sur la moitié d'outil fixe (5.1, 6.1) de l'outil MIR respectif (5, 6) indépendamment de la moitié d'outil mobile (3.2) de l'outil de moulage par injection (3).
  3. Procédé selon l'une des revendications 1 et 2,
    caractérisé en ce que
    un verrouillage des moitiés d'outil fixes et mobiles (5.1, 5.2, 6.1, 6.2) de l'outil MIR respectif (5, 6) est effectué et/ou un couplage des moitiés d'outil mobiles respectives (5.2, 6.2) de l'outil MIR respectif (5, 6) avec la moitié d'outil mobile (3.2) de l'outil de moulage par injection (3) ou avec un autre élément structurel de la machine de transformation des matières plastiques (1) est effectué en fonction du temps de cycle de moulage par injection et du temps de cycle MIR.
  4. Procédé selon l'une des revendications 1 à 3,
    caractérisé en ce que
    le déplacement ou le transfert de l'ébauche (10) entre les et/ou le vidage des moitiés d'outil fixes ou mobiles (3.1, 3.2, 5.1, 5.2, 6.1, 6.2) s'effectue de manière automatisée.
  5. Dispositif de fabrication de pièces moulées en plastique multicomposants dans lequel un outil de moulage par injection (3), comprenant une moitié d'outil fixe et une moitié d'outil mobile (3.1, 3.2), et un outil MIR (5), comprenant respectivement une moitié d'outil fixe et une moitié d'outil mobile (5.1, 5.2), est installé sur une machine de transformation des matières plastiques (1), la moitié d'outil fixe (5.1) de l'outil MIR (5) étant agencée de façon adjacente à la moitié d'outil fixe (3.1) de l'outil de moulage par injection (3) dans le sens radial par rapport au sens de fermeture des moitiés d'outil mobiles (3.2, 5.2),
    caractérisé en ce que
    la moitié d'outil mobile (5.2) de l'outil MIR (5) et la moitié d'outil mobile (3.2) de l'outil de moulage par injection (3) sont constituées de sorte à pouvoir être fermées simultanément, les moitiés d'outil MIR (5.1, 5.2) étant constituées de sorte à pouvoir être verrouillées ensemble indépendamment de l'outil de moulage par injection (3) et la moitié d'outil mobile (3.2) de l'outil de moulage par injection (3) étant constituée de sorte à pouvoir être ouverte sans ou avec la moitié d'outil mobile (5.2) de l'outil MIR (5).
  6. Dispositif de fabrication de pièces moulées en plastique multicomposants dans lequel un outil de moulage par injection (3), comprenant une moitié d'outil fixe et une moitié d'outil mobile (3.1, 3.2), et au moins deux outils MIR (5, 6), comprenant chacun une moitié d'outil fixe et une moitié d'outil mobile (5.1, 5.2, 6.1, 6.2), est installé sur une machine de transformation des matières plastiques (1), les moitiés d'outil fixes (5.1, 6.1) des outils MIR (5, 6) étant agencées de façon adjacente à la moitié d'outil fixe (3.1) de l'outil de moulage par injection (3) dans le sens radial par rapport au sens de fermeture des moitiés d'outil mobiles (3.2, 5.2, 6.2),
    caractérisé en ce que
    les moitiés d'outil mobiles (5.2, 6.2) des outils MIR (5, 6) et la moitié d'outil mobile (3.2) de l'outil de moulage par injection (3) sont constituées de sorte à pouvoir être fermées simultanément, les moitiés d'outil MIR (5.1, 5.2, 6.1, 6.2) étant constituées de sorte à pouvoir être verrouillées ensemble indépendamment de l'outil de moulage par injection (3) et la moitié d'outil mobile (3.2) de l'outil de moulage par injection (3) étant constituée de sorte à pouvoir être ouverte sans ou avec au moins l'une des moitiés d'outil mobiles (5.2, 6.2) des outils MIR (5, 6).
  7. Dispositif selon l'une des revendications 5 et 6,
    caractérisé en ce que
    les moitiés d'outil fixes et mobiles (5.1, 5.2, 6.1, 6.2) des outils MIR respectifs (5, 6) sont constituées de sorte à pouvoir être verrouillées individuellement.
  8. Dispositif selon l'une des revendications 5 à 7,
    caractérisé en ce que
    les moitiés d'outil mobiles respectives (5.2, 6.2) des outils MIR (5, 6) sont couplées ou constituées de sorte à pouvoir être couplées ou reliées directement ou indirectement avec la moitié d'outil mobile (3.2) de l'outil de moulage par injection (3) ou avec un autre élément structurel de la machine de transformation des matières plastiques (1).
  9. Dispositif selon l'une des revendications 5 à 8,
    caractérisé en ce que
    les moitiés d'outil mobiles respectives (5.2, 6.2) des outils MIR (5, 6) sont agencées sur une plaque de serrage (4) ou une plaque de fond (4) commune ou propre à chacune des moitiés ou commune avec la moitié d'outil mobile (3.2) de l'outil de moulage par injection (3).
  10. Dispositif selon l'une des revendications 5 à 9,
    caractérisé en ce que
    pour ouvrir l'outil MIR respectif (5, 6), la moitié d'outil mobile (5.2, 6.2) de l'outil MIR (5, 6) est constituée de sorte à pouvoir être déplacée de manière différée ou simultanée par rapport à la moitié d'outil mobile (3.2) de l'outil de moulage par injection (3) et/ou au moyen de la plaque de serrage (4) ou de la plaque de fond (4) commune.
  11. Dispositif selon l'une des revendications 5 à 10,
    caractérisé en ce que
    l'outil MIR (5) ou les outils MIR (5, 6) sont chacun prévus en quinconce sur le côté et/ou au-dessus et/ou en-dessous de l'outil de moulage par injection (3).
  12. Dispositif selon l'une des revendications 5 à 11,
    caractérisé en ce que
    un verrouillage par adhérence et/ou par coopération de formes, par exemple un système de clavettes à entraînement mécanique, hydraulique, pneumatique ou électrique ou un verrouillage magnétique, est prévu en tant que verrouillage des moitiés d'outil mobiles et fixes (5.1, 5.2, 6.1, 6.2) des outils MIR respectifs (5, 6).
  13. Dispositif selon l'une des revendications 5 à 12,
    caractérisé en ce que
    la moitié d'outil mobile (5.2, 6.2) des outils MIR respectifs (5, 6) est constituée de sorte à pouvoir être couplée de manière amovible sur la plaque de serrage (4) ou la plaque de fond (4) respective, étant prévu un couplage par adhérence et/ou par coopération de formes, par exemple sous la forme d'un couplage à entraînement mécanique, hydraulique, pneumatique ou électrique ou un couplage magnétique.
EP20167277.1A 2019-04-02 2020-03-31 Procédé et dispositif de fabrication des pièces moulées en matière plastique à plusieurs composants Active EP3718732B1 (fr)

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